Stirrup.



H. B. COX.

STIRRUP.

' APPLICATION FILED 001.212.1910.

Patented Aug. 15,1911.

COLUMBIA I'LANDGRAPH C04, WASHINGTON, D. c.

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Specification of Letters Patent.

Application filed October 12, 1910.

Patented Aug. 15, 1911.

Serial No. 586,782.

To all whom it may concern:

Be it known that I, HENRY B. Cox, a citizen of the United States, residing at Latham, in the county of Moniteau and State of Missouri, have invented new and useful Improvements in Stirrups, of which the following is a specification.

This invention relates to improvements in stirrups and more particularly to the type provided with a tread plate having one end detachably secured to one leg of the bow and arranged to be released by pressure of the riders foot in the event of the horse succeeding in unseating or throwing the rider.

One object of the invention is the provision of a stirrup including an outer bow and an inner bow and a thrust bar actuated by the inner bow to move one end of the tread plate from engagement with one limb of the outer bow.

Another object is the provision of an inner bow provided with a cam stud for actuating the thrust bar.

With these and other objects in view, which will more fully hereinafter appear, the present invention consists in certain novel details of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed. out in the appended claims; it being understood that various changes in the form, proportion, size, and minor details of the device may be made, within the scope of the appended claims, without departingfrom the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, forming part of the specification ;Figure 1 is a front elevation of a stirrup constructed in accordance with my invention. Fig. 2 is a perspective view of the same and showingthe tread plate released.

Similar numerals of reference are em ployed to designate corresponding parts throughout.

The limbs of the outer bow are designated by the numerals 5'and 6, the limb 6 being provided at its free end with a longitudinal recess or socket 7. The tread plate is designated by the numeral 8 and has one end hinged as shown at 9 to the free end of the limb 5 of the outer how. The opposite end portion of the tread plate 8 is provided with a T-shaped head 10, the stem portion of which is received by the socket 7 and when so received the lower. face of the stem will be in a plane with the free end of the limb 6, or substantially so.

The inner bow comprises limb portions 12 and 13 the said limb portions being of different lengths, the free end portion of the shorter limb 12 being pivoted as shown at 14; at a point adjacent to the free end portion of the limb 5 of the outer bow. The limb 13 at a point opposite to the pivotal connection between the limb 12 of the inner bow and limb 5 of the outer bow is provided with an opening which alines with a similar opening formed in the limb 6 of the outer bow, these alining openings re ceiving a pivot pin 15. That portion of the limb 18 extending beyond the pivot pin 15 corresponds in length, approximately to the corresponding portion of the limb 6 of the outer bow extending beyond the pivot pin 15, and terminates in a lateral foot or extension 16 to underlie the free end portion of the tread plate 8 when the said free end portion is within the socket 7.

It will be seen now by reference to the drawings that the limbs 12 and 13 of the inner bow are considerably less in width than the limbs 5 and 6 of the outer bow, the inner bow being so arranged that when moved to a position parallel with the outer bow one side of the limbs 12 and 13 of the inner bow will be coincident with one side of the limbs 5 and 6 of the outer bow, where- .by a considerable space will exist between the inner side of the limbs of the inner bow and the remote sides of the limbs of the outer bow.

Extending laterally from the limb 13 of the inner bow and in alinement with the pivot 15 thereof is a cam stud 17, said stud extending a trifle beyond the longitudinal medial line of the limb 6 of the outer bow as shown in the drawings. Formed integrally or otherwise secured to the inner face of the limb 6 of the outer bow and positioned below the cam stud 17 is a pair of spaced guide loops 18 and 19. Slidingly fitted in said guide loops is what will subsequently be termed a thrust bar 20, the said thrust bar corresponding in length approximately to the distance between the lower side of the cam stud 17 and inner end of the recess or socket 7.

With this construction it will be manifest that when the parts are positioned as shown in Fig. 1 the lower end of the thrust bar 20 will bear on the upper side of the free end portion of the tread plate 8. In the event of the rider becoming unseated and falling over one side of the horse the toe of the rider engaging with the upper end of the inner bow will rock the same, whereby the extension or foot 16 will move from engagement with the free end portion of the tread plate 8. It will be seen that as the inner bow moves the cam stud 17 will force the thrust bar 20 downwardly, whereupon the free end portion of the tread plate will be moved from the socket. The upper end portion of the thrust bar 20 is provided with lateral pins, one of which is shown and designated by the numeral 21, the said pins being positioned to engage with the upper guide loop 19 after the lower end of the thrust bar moves to the outer end of the socket 7,

whereby further outward movement of the thrust bar will be prevented. I

From the foregoing, it is evident that I have provided a device which is comparatively simple in structure and inexpensive to manufacture, embodying few parts and these so arranged that the danger of derangement will be reduced to a minimum.

I claim 1. A safety stirrup embodying an outer bow, a tread plate detachably secured to the same, a pivoted inner bow to engage the tread plate and hold the same in engagement with the outer bow, a thrust bar, and means carried by the inner bow to actuate the thrust bar to move the tread plate from engagement withthe outer bow when the inner bow moves from engagement with the tread plate.

2. A safety stirrup comprising an outer bow, one limb of which is provided with a socket, a tread plate pivoted at one end to one limb of the outer bow and having its opposite end adapted for'insertion into the socket, an inner bow pivoted to the outer bow and having means to engage the free end portion of the tread plate and hold the same within the socket, a thrust bar ar- 1 ranged on one limb of the outer bow, and

means carried by the inner bow to move the thrust bar into engagement with the free end portion of the tread plate when the inner bow moves from engagement with the tread plate. In testimony whereof I affix my signature in presence of two witnesses.

HENRY B. COX.

' Vitnesses:

F. W. SCOTT,

J. O. ELLIOTT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

